Having problems with your 1996 Chevrolet S-10 Pickup ?

I have Low compression in Cylinder 6 and a missfire code. I'm pretty sure it's not rings, how can I test to see if its valves. And is it a common problem with S10 4.3 vortec motors?

Posted / edited by AnonymousUser on : 15-07-2019

Answers :

Squirt oil into cylinder and crank it over a few revolutions move oil around in cylinder, then do compression test. If pressure increases substantially then it is rings, if little to no change it is valves or headgasket.
Leak down tester, swap the spark plug for the tester, have the motor set where both valves are closed, that means taking off the valve cover, inject the air and watch the gauge.
\015\012If it leaks quickly then suspect valves, squirt in a bit of oil and try again, if no change you have a suspect. If you have good compression on the other cylinders then I would agree on the rings.
Repair Help & Product Troubleshooting for 1996 Chevrolet S-10 Pickup

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